123111331113 has 32 divisors (see below), whose sum is σ = 169336645632. Its totient is φ = 79509862400.

The previous prime is 123111331111. The next prime is 123111331121. The reversal of 123111331113 is 311133111321.

It is a cyclic number.

It is not a de Polignac number, because 123111331113 - 2¹ = 123111331111 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123111331113.

It is not an unprimeable number, because it can be changed into a prime (123111331111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13926931 + ... + 13935767.

It is an arithmetic number, because the mean of its divisors is an integer number (5291770176).

Almost surely, 2^123111331113 is an apocalyptic number.

It is an amenable number.

123111331113 is a deficient number, since it is larger than the sum of its proper divisors (46225314519).

123111331113 is a wasteful number, since it uses less digits than its factorization.

123111331113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9665.

The product of its digits is 162, while the sum is 21.

Adding to 123111331113 its reverse (311133111321), we get a palindrome (434244442434).

The spelling of 123111331113 in words is "one hundred twenty-three billion, one hundred eleven million, three hundred thirty-one thousand, one hundred thirteen".